AM.III.I.K13

From the FAA library

• Aviation Maintenance Technician Handbook - Airframep. 14-31
  Chapter 14: Aircraft Fuel Systems › Fuel Pumps › Vane-Type Fuel Pumps

  outlet port located there causes fuel to be forced from the cylinder. [Figure 14-53] The engine-driven fuel pump delivers more fuel than the engine needs to operate. However, the constant volume of a vane pump can be excessive ... which returns excess fuel to the inlet side of the pump. Figure 14-54 shows a typical vane type fuel pump with this adjustable pressure relief function. By setting the relief at a certain pressure above the engine fuel metering…

• Aviation Maintenance Technician Handbook - Powerplantp. 2-41
  Chapter 2: Engine Fuel & Fuel Metering Systems › Engine Fuel System Components › Main Fuel Pumps (Engine Driven)

  time to be recirculated. The bypass fuel is routed to the inlet side of the second stage pump. Fuel flows from the pump to the fuel metering unit or fuel control. The fuel control is often attached to the fuel ... pump. The fuel pump is also lubricated by the fuel passing through the pump, and it should never be turned without fuel flow supplied to the inlet of the pump. As the engine coasts down at shutdown, the fuel pump…

• Aviation Maintenance Technician Handbook - Airframep. 14-29
  Chapter 14: Aircraft Fuel Systems › Fuel Pumps › Ejector Pumps

  tank pump area, allows fuel to be drawn into the ejector assembly where it is pumped into the fuel pump tank section. Together, with baffle check valves, ejector pumps keep a positive head of fuel at the inlet ... area of the fuel tank. Pulsating Electric Pumps General aviation aircraft often make use of smaller, less expensive auxiliary fuel pumps. The pulsating electric pump, or plunger-type fuel pump, is common. It is usually used in the same manner…